(225 ILCS 705/20.23) (from Ch. 96 1/2, par. 2023)
Sec. 20.23.
No person shall drill or shoot a dead hole as hereinafter
defined. A "dead hole" is a hole where the width of the shot at the point
measured at right angles to the line of the hole is so great that the heel
is not of sufficient strength to at least balance the resistance at the
point. The heel means that part of the shot which lies outside of the
explosive.
(Source: Laws 1953, p. 701.)
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